/* -----------------------------------------------
/* Author : Vincent Garreau  - vincentgarreau.com
/* MIT license: http://opensource.org/licenses/MIT
/* Demo / Generator : vincentgarreau.com/particles.js
/* GitHub : github.com/VincentGarreau/particles.js
/* How to use? : Check the GitHub README
/* v2.0.0
/* ----------------------------------------------- */

var pJS = function(tag_id, params){

	var canvas_el = document.querySelector('#'+tag_id+' > .particles-js-canvas-el');

	/* particles.js variables with default values */
	this.pJS = {
		canvas: {
			el: canvas_el,
			w: canvas_el.offsetWidth,
			h: canvas_el.offsetHeight
		},
		particles: {
			number: {
				value: 400,
				density: {
					enable: true,
					value_area: 800
				}
			},
			color: {
				value: '#fff'
			},
			shape: {
				type: 'circle',
				stroke: {
					width: 0,
					color: '#ff0000'
				},
				polygon: {
					nb_sides: 5
				},
				image: {
					src: '',
					width: 100,
					height: 100
				}
			},
			opacity: {
				value: 1,
				random: false,
				anim: {
					enable: false,
					speed: 2,
					opacity_min: 0,
					sync: false
				}
			},
			size: {
				value: 20,
				random: false,
				anim: {
					enable: false,
					speed: 20,
					size_min: 0,
					sync: false
				}
			},
			line_linked: {
				enable: true,
				distance: 100,
				color: '#fff',
				opacity: 1,
				width: 1
			},
			move: {
				enable: true,
				speed: 2,
				direction: 'none',
				random: false,
				straight: false,
				out_mode: 'out',
				bounce: false,
				attract: {
					enable: false,
					rotateX: 3000,
					rotateY: 3000
				}
			},
			array: []
		},
		interactivity: {
			detect_on: 'canvas',
			events: {
				onhover: {
					enable: true,
					mode: 'grab'
				},
				onclick: {
					enable: true,
					mode: 'push'
				},
				resize: true
			},
			modes: {
				grab:{
					distance: 100,
					line_linked:{
						opacity: 1
					}
				},
				bubble:{
					distance: 200,
					size: 80,
					duration: 0.4
				},
				repulse:{
					distance: 200,
					duration: 0.4
				},
				push:{
					particles_nb: 4
				},
				remove:{
					particles_nb: 2
				}
			},
			mouse:{}
		},
		retina_detect: false,
		fn: {
			interact: {},
			modes: {},
			vendors:{}
		},
		tmp: {}
	};

	var pJS = this.pJS;

	/* params settings */
	if(params){
		Object.deepExtend(pJS, params);
	}

	pJS.tmp.obj = {
		size_value: pJS.particles.size.value,
		size_anim_speed: pJS.particles.size.anim.speed,
		move_speed: pJS.particles.move.speed,
		line_linked_distance: pJS.particles.line_linked.distance,
		line_linked_width: pJS.particles.line_linked.width,
		mode_grab_distance: pJS.interactivity.modes.grab.distance,
		mode_bubble_distance: pJS.interactivity.modes.bubble.distance,
		mode_bubble_size: pJS.interactivity.modes.bubble.size,
		mode_repulse_distance: pJS.interactivity.modes.repulse.distance
	};


	pJS.fn.retinaInit = function(){

		if(pJS.retina_detect && window.devicePixelRatio > 1){
			pJS.canvas.pxratio = window.devicePixelRatio;
			pJS.tmp.retina = true;
		}
		else{
			pJS.canvas.pxratio = 1;
			pJS.tmp.retina = false;
		}

		pJS.canvas.w = pJS.canvas.el.offsetWidth * pJS.canvas.pxratio;
		pJS.canvas.h = pJS.canvas.el.offsetHeight * pJS.canvas.pxratio;

		pJS.particles.size.value = pJS.tmp.obj.size_value * pJS.canvas.pxratio;
		pJS.particles.size.anim.speed = pJS.tmp.obj.size_anim_speed * pJS.canvas.pxratio;
		pJS.particles.move.speed = pJS.tmp.obj.move_speed * pJS.canvas.pxratio;
		pJS.particles.line_linked.distance = pJS.tmp.obj.line_linked_distance * pJS.canvas.pxratio;
		pJS.interactivity.modes.grab.distance = pJS.tmp.obj.mode_grab_distance * pJS.canvas.pxratio;
		pJS.interactivity.modes.bubble.distance = pJS.tmp.obj.mode_bubble_distance * pJS.canvas.pxratio;
		pJS.particles.line_linked.width = pJS.tmp.obj.line_linked_width * pJS.canvas.pxratio;
		pJS.interactivity.modes.bubble.size = pJS.tmp.obj.mode_bubble_size * pJS.canvas.pxratio;
		pJS.interactivity.modes.repulse.distance = pJS.tmp.obj.mode_repulse_distance * pJS.canvas.pxratio;

	};



	/* ---------- pJS functions - canvas ------------ */

	pJS.fn.canvasInit = function(){
		pJS.canvas.ctx = pJS.canvas.el.getContext('2d');
	};

	pJS.fn.canvasSize = function(){

		pJS.canvas.el.width = pJS.canvas.w;
		pJS.canvas.el.height = pJS.canvas.h;

		if(pJS && pJS.interactivity.events.resize){

			window.addEventListener('resize', function(){

				pJS.canvas.w = pJS.canvas.el.offsetWidth;
				pJS.canvas.h = pJS.canvas.el.offsetHeight;

				/* resize canvas */
				if(pJS.tmp.retina){
					pJS.canvas.w *= pJS.canvas.pxratio;
					pJS.canvas.h *= pJS.canvas.pxratio;
				}

				pJS.canvas.el.width = pJS.canvas.w;
				pJS.canvas.el.height = pJS.canvas.h;

				/* repaint canvas on anim disabled */
				if(!pJS.particles.move.enable){
					pJS.fn.particlesEmpty();
					pJS.fn.particlesCreate();
					pJS.fn.particlesDraw();
					pJS.fn.vendors.densityAutoParticles();
				}

				/* density particles enabled */
				pJS.fn.vendors.densityAutoParticles();

			});

		}

	};


	pJS.fn.canvasPaint = function(){
		pJS.canvas.ctx.fillRect(0, 0, pJS.canvas.w, pJS.canvas.h);
	};

	pJS.fn.canvasClear = function(){
		pJS.canvas.ctx.clearRect(0, 0, pJS.canvas.w, pJS.canvas.h);
	};


	/* --------- pJS functions - particles ----------- */

	pJS.fn.particle = function(color, opacity, position){

		/* size */
		this.radius = (pJS.particles.size.random ? Math.random() : 1) * pJS.particles.size.value;
		if(pJS.particles.size.anim.enable){
			this.size_status = false;
			this.vs = pJS.particles.size.anim.speed / 100;
			if(!pJS.particles.size.anim.sync){
				this.vs = this.vs * Math.random();
			}
		}

		/* position */
		this.x = position ? position.x : Math.random() * pJS.canvas.w;
		this.y = position ? position.y : Math.random() * pJS.canvas.h;

		/* check position  - into the canvas */
		if(this.x > pJS.canvas.w - this.radius*2) this.x = this.x - this.radius;
		else if(this.x < this.radius*2) this.x = this.x + this.radius;
		if(this.y > pJS.canvas.h - this.radius*2) this.y = this.y - this.radius;
		else if(this.y < this.radius*2) this.y = this.y + this.radius;

		/* check position - avoid overlap */
		if(pJS.particles.move.bounce){
			pJS.fn.vendors.checkOverlap(this, position);
		}

		/* color */
		this.color = {};
		if(typeof(color.value) == 'object'){

			if(color.value instanceof Array){
				var color_selected = color.value[Math.floor(Math.random() * pJS.particles.color.value.length)];
				this.color.rgb = hexToRgb(color_selected);
			}else{
				if(color.value.r != undefined && color.value.g != undefined && color.value.b != undefined){
					this.color.rgb = {
						r: color.value.r,
						g: color.value.g,
						b: color.value.b
					}
				}
				if(color.value.h != undefined && color.value.s != undefined && color.value.l != undefined){
					this.color.hsl = {
						h: color.value.h,
						s: color.value.s,
						l: color.value.l
					}
				}
			}

		}
		else if(color.value == 'random'){
			this.color.rgb = {
				r: (Math.floor(Math.random() * (255 - 0 + 1)) + 0),
				g: (Math.floor(Math.random() * (255 - 0 + 1)) + 0),
				b: (Math.floor(Math.random() * (255 - 0 + 1)) + 0)
			}
		}
		else if(typeof(color.value) == 'string'){
			this.color = color;
			this.color.rgb = hexToRgb(this.color.value);
		}

		/* opacity */
		this.opacity = (pJS.particles.opacity.random ? Math.random() : 1) * pJS.particles.opacity.value;
		if(pJS.particles.opacity.anim.enable){
			this.opacity_status = false;
			this.vo = pJS.particles.opacity.anim.speed / 100;
			if(!pJS.particles.opacity.anim.sync){
				this.vo = this.vo * Math.random();
			}
		}

		/* animation - velocity for speed */
		var velbase = {}
		switch(pJS.particles.move.direction){
			case 'top':
				velbase = { x:0, y:-1 };
				break;
			case 'top-right':
				velbase = { x:0.5, y:-0.5 };
				break;
			case 'right':
				velbase = { x:1, y:-0 };
				break;
			case 'bottom-right':
				velbase = { x:0.5, y:0.5 };
				break;
			case 'bottom':
				velbase = { x:0, y:1 };
				break;
			case 'bottom-left':
				velbase = { x:-0.5, y:1 };
				break;
			case 'left':
				velbase = { x:-1, y:0 };
				break;
			case 'top-left':
				velbase = { x:-0.5, y:-0.5 };
				break;
			default:
				velbase = { x:0, y:0 };
				break;
		}

		if(pJS.particles.move.straight){
			this.vx = velbase.x;
			this.vy = velbase.y;
			if(pJS.particles.move.random){
				this.vx = this.vx * (Math.random());
				this.vy = this.vy * (Math.random());
			}
		}else{
			this.vx = velbase.x + Math.random()-0.5;
			this.vy = velbase.y + Math.random()-0.5;
		}

		// var theta = 2.0 * Math.PI * Math.random();
		// this.vx = Math.cos(theta);
		// this.vy = Math.sin(theta);

		this.vx_i = this.vx;
		this.vy_i = this.vy;



		/* if shape is image */

		var shape_type = pJS.particles.shape.type;
		if(typeof(shape_type) == 'object'){
			if(shape_type instanceof Array){
				var shape_selected = shape_type[Math.floor(Math.random() * shape_type.length)];
				this.shape = shape_selected;
			}
		}else{
			this.shape = shape_type;
		}

		if(this.shape == 'image'){
			var sh = pJS.particles.shape;
			this.img = {
				src: sh.image.src,
				ratio: sh.image.width / sh.image.height
			}
			if(!this.img.ratio) this.img.ratio = 1;
			if(pJS.tmp.img_type == 'svg' && pJS.tmp.source_svg != undefined){
				pJS.fn.vendors.createSvgImg(this);
				if(pJS.tmp.pushing){
					this.img.loaded = false;
				}
			}
		}



	};


	pJS.fn.particle.prototype.draw = function() {

		var p = this;

		if(p.radius_bubble != undefined){
			var radius = p.radius_bubble;
		}else{
			var radius = p.radius;
		}

		if(p.opacity_bubble != undefined){
			var opacity = p.opacity_bubble;
		}else{
			var opacity = p.opacity;
		}

		if(p.color.rgb){
			var color_value = 'rgba('+p.color.rgb.r+','+p.color.rgb.g+','+p.color.rgb.b+','+opacity+')';
		}else{
			var color_value = 'hsla('+p.color.hsl.h+','+p.color.hsl.s+'%,'+p.color.hsl.l+'%,'+opacity+')';
		}

		pJS.canvas.ctx.fillStyle = color_value;
		pJS.canvas.ctx.beginPath();

		switch(p.shape){

			case 'circle':
				pJS.canvas.ctx.arc(p.x, p.y, radius, 0, Math.PI * 2, false);
				break;

			case 'edge':
				pJS.canvas.ctx.rect(p.x-radius, p.y-radius, radius*2, radius*2);
				break;

			case 'triangle':
				pJS.fn.vendors.drawShape(pJS.canvas.ctx, p.x-radius, p.y+radius / 1.66, radius*2, 3, 2);
				break;

			case 'polygon':
				pJS.fn.vendors.drawShape(
					pJS.canvas.ctx,
					p.x - radius / (pJS.particles.shape.polygon.nb_sides/3.5), // startX
					p.y - radius / (2.66/3.5), // startY
					radius*2.66 / (pJS.particles.shape.polygon.nb_sides/3), // sideLength
					pJS.particles.shape.polygon.nb_sides, // sideCountNumerator
					1 // sideCountDenominator
				);
				break;

			case 'star':
				pJS.fn.vendors.drawShape(
					pJS.canvas.ctx,
					p.x - radius*2 / (pJS.particles.shape.polygon.nb_sides/4), // startX
					p.y - radius / (2*2.66/3.5), // startY
					radius*2*2.66 / (pJS.particles.shape.polygon.nb_sides/3), // sideLength
					pJS.particles.shape.polygon.nb_sides, // sideCountNumerator
					2 // sideCountDenominator
				);
				break;

			case 'image':

			function draw(){
				pJS.canvas.ctx.drawImage(
					img_obj,
					p.x-radius,
					p.y-radius,
					radius*2,
					radius*2 / p.img.ratio
				);
			}

				if(pJS.tmp.img_type == 'svg'){
					var img_obj = p.img.obj;
				}else{
					var img_obj = pJS.tmp.img_obj;
				}

				if(img_obj){
					draw();
				}

				break;

		}

		pJS.canvas.ctx.closePath();

		if(pJS.particles.shape.stroke.width > 0){
			pJS.canvas.ctx.strokeStyle = pJS.particles.shape.stroke.color;
			pJS.canvas.ctx.lineWidth = pJS.particles.shape.stroke.width;
			pJS.canvas.ctx.stroke();
		}

		pJS.canvas.ctx.fill();

	};


	pJS.fn.particlesCreate = function(){
		for(var i = 0; i < pJS.particles.number.value; i++) {
			pJS.particles.array.push(new pJS.fn.particle(pJS.particles.color, pJS.particles.opacity.value));
		}
	};

	pJS.fn.particlesUpdate = function(){

		for(var i = 0; i < pJS.particles.array.length; i++){

			/* the particle */
			var p = pJS.particles.array[i];

			// var d = ( dx = pJS.interactivity.mouse.click_pos_x - p.x ) * dx + ( dy = pJS.interactivity.mouse.click_pos_y - p.y ) * dy;
			// var f = -BANG_SIZE / d;
			// if ( d < BANG_SIZE ) {
			//     var t = Math.atan2( dy, dx );
			//     p.vx = f * Math.cos(t);
			//     p.vy = f * Math.sin(t);
			// }

			/* move the particle */
			if(pJS.particles.move.enable){
				var ms = pJS.particles.move.speed/2;
				p.x += p.vx * ms;
				p.y += p.vy * ms;
			}

			/* change opacity status */
			if(pJS.particles.opacity.anim.enable) {
				if(p.opacity_status == true) {
					if(p.opacity >= pJS.particles.opacity.value) p.opacity_status = false;
					p.opacity += p.vo;
				}else {
					if(p.opacity <= pJS.particles.opacity.anim.opacity_min) p.opacity_status = true;
					p.opacity -= p.vo;
				}
				if(p.opacity < 0) p.opacity = 0;
			}

			/* change size */
			if(pJS.particles.size.anim.enable){
				if(p.size_status == true){
					if(p.radius >= pJS.particles.size.value) p.size_status = false;
					p.radius += p.vs;
				}else{
					if(p.radius <= pJS.particles.size.anim.size_min) p.size_status = true;
					p.radius -= p.vs;
				}
				if(p.radius < 0) p.radius = 0;
			}

			/* change particle position if it is out of canvas */
			if(pJS.particles.move.out_mode == 'bounce'){
				var new_pos = {
					x_left: p.radius,
					x_right:  pJS.canvas.w,
					y_top: p.radius,
					y_bottom: pJS.canvas.h
				}
			}else{
				var new_pos = {
					x_left: -p.radius,
					x_right: pJS.canvas.w + p.radius,
					y_top: -p.radius,
					y_bottom: pJS.canvas.h + p.radius
				}
			}

			if(p.x - p.radius > pJS.canvas.w){
				p.x = new_pos.x_left;
				p.y = Math.random() * pJS.canvas.h;
			}
			else if(p.x + p.radius < 0){
				p.x = new_pos.x_right;
				p.y = Math.random() * pJS.canvas.h;
			}
			if(p.y - p.radius > pJS.canvas.h){
				p.y = new_pos.y_top;
				p.x = Math.random() * pJS.canvas.w;
			}
			else if(p.y + p.radius < 0){
				p.y = new_pos.y_bottom;
				p.x = Math.random() * pJS.canvas.w;
			}

			/* out of canvas modes */
			switch(pJS.particles.move.out_mode){
				case 'bounce':
					if (p.x + p.radius > pJS.canvas.w) p.vx = -p.vx;
					else if (p.x - p.radius < 0) p.vx = -p.vx;
					if (p.y + p.radius > pJS.canvas.h) p.vy = -p.vy;
					else if (p.y - p.radius < 0) p.vy = -p.vy;
					break;
			}

			/* events */
			if(isInArray('grab', pJS.interactivity.events.onhover.mode)){
				pJS.fn.modes.grabParticle(p);
			}

			if(isInArray('bubble', pJS.interactivity.events.onhover.mode) || isInArray('bubble', pJS.interactivity.events.onclick.mode)){
				pJS.fn.modes.bubbleParticle(p);
			}

			if(isInArray('repulse', pJS.interactivity.events.onhover.mode) || isInArray('repulse', pJS.interactivity.events.onclick.mode)){
				pJS.fn.modes.repulseParticle(p);
			}

			/* interaction auto between particles */
			if(pJS.particles.line_linked.enable || pJS.particles.move.attract.enable){
				for(var j = i + 1; j < pJS.particles.array.length; j++){
					var p2 = pJS.particles.array[j];

					/* link particles */
					if(pJS.particles.line_linked.enable){
						pJS.fn.interact.linkParticles(p,p2);
					}

					/* attract particles */
					if(pJS.particles.move.attract.enable){
						pJS.fn.interact.attractParticles(p,p2);
					}

					/* bounce particles */
					if(pJS.particles.move.bounce){
						pJS.fn.interact.bounceParticles(p,p2);
					}

				}
			}


		}

	};

	pJS.fn.particlesDraw = function(){

		/* clear canvas */
		pJS.canvas.ctx.clearRect(0, 0, pJS.canvas.w, pJS.canvas.h);

		/* update each particles param */
		pJS.fn.particlesUpdate();

		/* draw each particle */
		for(var i = 0; i < pJS.particles.array.length; i++){
			var p = pJS.particles.array[i];
			p.draw();
		}

	};

	pJS.fn.particlesEmpty = function(){
		pJS.particles.array = [];
	};

	pJS.fn.particlesRefresh = function(){

		/* init all */
		cancelRequestAnimFrame(pJS.fn.checkAnimFrame);
		cancelRequestAnimFrame(pJS.fn.drawAnimFrame);
		pJS.tmp.source_svg = undefined;
		pJS.tmp.img_obj = undefined;
		pJS.tmp.count_svg = 0;
		pJS.fn.particlesEmpty();
		pJS.fn.canvasClear();

		/* restart */
		pJS.fn.vendors.start();

	};


	/* ---------- pJS functions - particles interaction ------------ */

	pJS.fn.interact.linkParticles = function(p1, p2){

		var dx = p1.x - p2.x,
			dy = p1.y - p2.y,
			dist = Math.sqrt(dx*dx + dy*dy);

		/* draw a line between p1 and p2 if the distance between them is under the config distance */
		if(dist <= pJS.particles.line_linked.distance){

			var opacity_line = pJS.particles.line_linked.opacity - (dist / (1/pJS.particles.line_linked.opacity)) / pJS.particles.line_linked.distance;

			if(opacity_line > 0){

				/* style */
				var color_line = pJS.particles.line_linked.color_rgb_line;
				pJS.canvas.ctx.strokeStyle = 'rgba('+color_line.r+','+color_line.g+','+color_line.b+','+opacity_line+')';
				pJS.canvas.ctx.lineWidth = pJS.particles.line_linked.width;
				//pJS.canvas.ctx.lineCap = 'round'; /* performance issue */

				/* path */
				pJS.canvas.ctx.beginPath();
				pJS.canvas.ctx.moveTo(p1.x, p1.y);
				pJS.canvas.ctx.lineTo(p2.x, p2.y);
				pJS.canvas.ctx.stroke();
				pJS.canvas.ctx.closePath();

			}

		}

	};


	pJS.fn.interact.attractParticles  = function(p1, p2){

		/* condensed particles */
		var dx = p1.x - p2.x,
			dy = p1.y - p2.y,
			dist = Math.sqrt(dx*dx + dy*dy);

		if(dist <= pJS.particles.line_linked.distance){

			var ax = dx/(pJS.particles.move.attract.rotateX*1000),
				ay = dy/(pJS.particles.move.attract.rotateY*1000);

			p1.vx -= ax;
			p1.vy -= ay;

			p2.vx += ax;
			p2.vy += ay;

		}


	}


	pJS.fn.interact.bounceParticles = function(p1, p2){

		var dx = p1.x - p2.x,
			dy = p1.y - p2.y,
			dist = Math.sqrt(dx*dx + dy*dy),
			dist_p = p1.radius+p2.radius;

		if(dist <= dist_p){
			p1.vx = -p1.vx;
			p1.vy = -p1.vy;

			p2.vx = -p2.vx;
			p2.vy = -p2.vy;
		}

	}


	/* ---------- pJS functions - modes events ------------ */

	pJS.fn.modes.pushParticles = function(nb, pos){

		pJS.tmp.pushing = true;

		for(var i = 0; i < nb; i++){
			pJS.particles.array.push(
				new pJS.fn.particle(
					pJS.particles.color,
					pJS.particles.opacity.value,
					{
						'x': pos ? pos.pos_x : Math.random() * pJS.canvas.w,
						'y': pos ? pos.pos_y : Math.random() * pJS.canvas.h
					}
				)
			)
			if(i == nb-1){
				if(!pJS.particles.move.enable){
					pJS.fn.particlesDraw();
				}
				pJS.tmp.pushing = false;
			}
		}

	};


	pJS.fn.modes.removeParticles = function(nb){

		pJS.particles.array.splice(0, nb);
		if(!pJS.particles.move.enable){
			pJS.fn.particlesDraw();
		}

	};


	pJS.fn.modes.bubbleParticle = function(p){

		/* on hover event */
		if(pJS.interactivity.events.onhover.enable && isInArray('bubble', pJS.interactivity.events.onhover.mode)){

			var dx_mouse = p.x - pJS.interactivity.mouse.pos_x,
				dy_mouse = p.y - pJS.interactivity.mouse.pos_y,
				dist_mouse = Math.sqrt(dx_mouse*dx_mouse + dy_mouse*dy_mouse),
				ratio = 1 - dist_mouse / pJS.interactivity.modes.bubble.distance;

			function init(){
				p.opacity_bubble = p.opacity;
				p.radius_bubble = p.radius;
			}

			/* mousemove - check ratio */
			if(dist_mouse <= pJS.interactivity.modes.bubble.distance){

				if(ratio >= 0 && pJS.interactivity.status == 'mousemove'){

					/* size */
					if(pJS.interactivity.modes.bubble.size != pJS.particles.size.value){

						if(pJS.interactivity.modes.bubble.size > pJS.particles.size.value){
							var size = p.radius + (pJS.interactivity.modes.bubble.size*ratio);
							if(size >= 0){
								p.radius_bubble = size;
							}
						}else{
							var dif = p.radius - pJS.interactivity.modes.bubble.size,
								size = p.radius - (dif*ratio);
							if(size > 0){
								p.radius_bubble = size;
							}else{
								p.radius_bubble = 0;
							}
						}

					}

					/* opacity */
					if(pJS.interactivity.modes.bubble.opacity != pJS.particles.opacity.value){

						if(pJS.interactivity.modes.bubble.opacity > pJS.particles.opacity.value){
							var opacity = pJS.interactivity.modes.bubble.opacity*ratio;
							if(opacity > p.opacity && opacity <= pJS.interactivity.modes.bubble.opacity){
								p.opacity_bubble = opacity;
							}
						}else{
							var opacity = p.opacity - (pJS.particles.opacity.value-pJS.interactivity.modes.bubble.opacity)*ratio;
							if(opacity < p.opacity && opacity >= pJS.interactivity.modes.bubble.opacity){
								p.opacity_bubble = opacity;
							}
						}

					}

				}

			}else{
				init();
			}


			/* mouseleave */
			if(pJS.interactivity.status == 'mouseleave'){
				init();
			}

		}

		/* on click event */
		else if(pJS.interactivity.events.onclick.enable && isInArray('bubble', pJS.interactivity.events.onclick.mode)){


			if(pJS.tmp.bubble_clicking){
				var dx_mouse = p.x - pJS.interactivity.mouse.click_pos_x,
					dy_mouse = p.y - pJS.interactivity.mouse.click_pos_y,
					dist_mouse = Math.sqrt(dx_mouse*dx_mouse + dy_mouse*dy_mouse),
					time_spent = (new Date().getTime() - pJS.interactivity.mouse.click_time)/1000;

				if(time_spent > pJS.interactivity.modes.bubble.duration){
					pJS.tmp.bubble_duration_end = true;
				}

				if(time_spent > pJS.interactivity.modes.bubble.duration*2){
					pJS.tmp.bubble_clicking = false;
					pJS.tmp.bubble_duration_end = false;
				}
			}


			function process(bubble_param, particles_param, p_obj_bubble, p_obj, id){

				if(bubble_param != particles_param){

					if(!pJS.tmp.bubble_duration_end){
						if(dist_mouse <= pJS.interactivity.modes.bubble.distance){
							if(p_obj_bubble != undefined) var obj = p_obj_bubble;
							else var obj = p_obj;
							if(obj != bubble_param){
								var value = p_obj - (time_spent * (p_obj - bubble_param) / pJS.interactivity.modes.bubble.duration);
								if(id == 'size') p.radius_bubble = value;
								if(id == 'opacity') p.opacity_bubble = value;
							}
						}else{
							if(id == 'size') p.radius_bubble = undefined;
							if(id == 'opacity') p.opacity_bubble = undefined;
						}
					}else{
						if(p_obj_bubble != undefined){
							var value_tmp = p_obj - (time_spent * (p_obj - bubble_param) / pJS.interactivity.modes.bubble.duration),
								dif = bubble_param - value_tmp;
							value = bubble_param + dif;
							if(id == 'size') p.radius_bubble = value;
							if(id == 'opacity') p.opacity_bubble = value;
						}
					}

				}

			}

			if(pJS.tmp.bubble_clicking){
				/* size */
				process(pJS.interactivity.modes.bubble.size, pJS.particles.size.value, p.radius_bubble, p.radius, 'size');
				/* opacity */
				process(pJS.interactivity.modes.bubble.opacity, pJS.particles.opacity.value, p.opacity_bubble, p.opacity, 'opacity');
			}

		}

	};


	pJS.fn.modes.repulseParticle = function(p){

		if(pJS.interactivity.events.onhover.enable && isInArray('repulse', pJS.interactivity.events.onhover.mode) && pJS.interactivity.status == 'mousemove') {

			var dx_mouse = p.x - pJS.interactivity.mouse.pos_x,
				dy_mouse = p.y - pJS.interactivity.mouse.pos_y,
				dist_mouse = Math.sqrt(dx_mouse*dx_mouse + dy_mouse*dy_mouse);

			var normVec = {x: dx_mouse/dist_mouse, y: dy_mouse/dist_mouse},
				repulseRadius = pJS.interactivity.modes.repulse.distance,
				velocity = 100,
				repulseFactor = clamp((1/repulseRadius)*(-1*Math.pow(dist_mouse/repulseRadius,2)+1)*repulseRadius*velocity, 0, 50);

			var pos = {
				x: p.x + normVec.x * repulseFactor,
				y: p.y + normVec.y * repulseFactor
			}

			if(pJS.particles.move.out_mode == 'bounce'){
				if(pos.x - p.radius > 0 && pos.x + p.radius < pJS.canvas.w) p.x = pos.x;
				if(pos.y - p.radius > 0 && pos.y + p.radius < pJS.canvas.h) p.y = pos.y;
			}else{
				p.x = pos.x;
				p.y = pos.y;
			}

		}


		else if(pJS.interactivity.events.onclick.enable && isInArray('repulse', pJS.interactivity.events.onclick.mode)) {

			if(!pJS.tmp.repulse_finish){
				pJS.tmp.repulse_count++;
				if(pJS.tmp.repulse_count == pJS.particles.array.length){
					pJS.tmp.repulse_finish = true;
				}
			}

			if(pJS.tmp.repulse_clicking){

				var repulseRadius = Math.pow(pJS.interactivity.modes.repulse.distance/6, 3);

				var dx = pJS.interactivity.mouse.click_pos_x - p.x,
					dy = pJS.interactivity.mouse.click_pos_y - p.y,
					d = dx*dx + dy*dy;

				var force = -repulseRadius / d * 1;

				function process(){

					var f = Math.atan2(dy,dx);
					p.vx = force * Math.cos(f);
					p.vy = force * Math.sin(f);

					if(pJS.particles.move.out_mode == 'bounce'){
						var pos = {
							x: p.x + p.vx,
							y: p.y + p.vy
						}
						if (pos.x + p.radius > pJS.canvas.w) p.vx = -p.vx;
						else if (pos.x - p.radius < 0) p.vx = -p.vx;
						if (pos.y + p.radius > pJS.canvas.h) p.vy = -p.vy;
						else if (pos.y - p.radius < 0) p.vy = -p.vy;
					}

				}

				// default
				if(d <= repulseRadius){
					process();
				}

				// bang - slow motion mode
				// if(!pJS.tmp.repulse_finish){
				//   if(d <= repulseRadius){
				//     process();
				//   }
				// }else{
				//   process();
				// }


			}else{

				if(pJS.tmp.repulse_clicking == false){

					p.vx = p.vx_i;
					p.vy = p.vy_i;

				}

			}

		}

	}


	pJS.fn.modes.grabParticle = function(p){

		if(pJS.interactivity.events.onhover.enable && pJS.interactivity.status == 'mousemove'){

			var dx_mouse = p.x - pJS.interactivity.mouse.pos_x,
				dy_mouse = p.y - pJS.interactivity.mouse.pos_y,
				dist_mouse = Math.sqrt(dx_mouse*dx_mouse + dy_mouse*dy_mouse);

			/* draw a line between the cursor and the particle if the distance between them is under the config distance */
			if(dist_mouse <= pJS.interactivity.modes.grab.distance){

				var opacity_line = pJS.interactivity.modes.grab.line_linked.opacity - (dist_mouse / (1/pJS.interactivity.modes.grab.line_linked.opacity)) / pJS.interactivity.modes.grab.distance;

				if(opacity_line > 0){

					/* style */
					var color_line = pJS.particles.line_linked.color_rgb_line;
					pJS.canvas.ctx.strokeStyle = 'rgba('+color_line.r+','+color_line.g+','+color_line.b+','+opacity_line+')';
					pJS.canvas.ctx.lineWidth = pJS.particles.line_linked.width;
					//pJS.canvas.ctx.lineCap = 'round'; /* performance issue */

					/* path */
					pJS.canvas.ctx.beginPath();
					pJS.canvas.ctx.moveTo(p.x, p.y);
					pJS.canvas.ctx.lineTo(pJS.interactivity.mouse.pos_x, pJS.interactivity.mouse.pos_y);
					pJS.canvas.ctx.stroke();
					pJS.canvas.ctx.closePath();

				}

			}

		}

	};



	/* ---------- pJS functions - vendors ------------ */

	pJS.fn.vendors.eventsListeners = function(){

		/* events target element */
		if(pJS.interactivity.detect_on == 'window'){
			pJS.interactivity.el = window;
		}else{
			pJS.interactivity.el = pJS.canvas.el;
		}


		/* detect mouse pos - on hover / click event */
		if(pJS.interactivity.events.onhover.enable || pJS.interactivity.events.onclick.enable){

			/* el on mousemove */
			pJS.interactivity.el.addEventListener('mousemove', function(e){

				if(pJS.interactivity.el == window){
					var pos_x = e.clientX,
						pos_y = e.clientY;
				}
				else{
					var pos_x = e.offsetX || e.clientX,
						pos_y = e.offsetY || e.clientY;
				}

				pJS.interactivity.mouse.pos_x = pos_x;
				pJS.interactivity.mouse.pos_y = pos_y;

				if(pJS.tmp.retina){
					pJS.interactivity.mouse.pos_x *= pJS.canvas.pxratio;
					pJS.interactivity.mouse.pos_y *= pJS.canvas.pxratio;
				}

				pJS.interactivity.status = 'mousemove';

			});

			/* el on onmouseleave */
			pJS.interactivity.el.addEventListener('mouseleave', function(e){

				pJS.interactivity.mouse.pos_x = null;
				pJS.interactivity.mouse.pos_y = null;
				pJS.interactivity.status = 'mouseleave';

			});

		}

		/* on click event */
		if(pJS.interactivity.events.onclick.enable){

			pJS.interactivity.el.addEventListener('click', function(){

				pJS.interactivity.mouse.click_pos_x = pJS.interactivity.mouse.pos_x;
				pJS.interactivity.mouse.click_pos_y = pJS.interactivity.mouse.pos_y;
				pJS.interactivity.mouse.click_time = new Date().getTime();

				if(pJS.interactivity.events.onclick.enable){

					switch(pJS.interactivity.events.onclick.mode){

						case 'push':
							if(pJS.particles.move.enable){
								pJS.fn.modes.pushParticles(pJS.interactivity.modes.push.particles_nb, pJS.interactivity.mouse);
							}else{
								if(pJS.interactivity.modes.push.particles_nb == 1){
									pJS.fn.modes.pushParticles(pJS.interactivity.modes.push.particles_nb, pJS.interactivity.mouse);
								}
								else if(pJS.interactivity.modes.push.particles_nb > 1){
									pJS.fn.modes.pushParticles(pJS.interactivity.modes.push.particles_nb);
								}
							}
							break;

						case 'remove':
							pJS.fn.modes.removeParticles(pJS.interactivity.modes.remove.particles_nb);
							break;

						case 'bubble':
							pJS.tmp.bubble_clicking = true;
							break;

						case 'repulse':
							pJS.tmp.repulse_clicking = true;
							pJS.tmp.repulse_count = 0;
							pJS.tmp.repulse_finish = false;
							setTimeout(function(){
								pJS.tmp.repulse_clicking = false;
							}, pJS.interactivity.modes.repulse.duration*1000)
							break;

					}

				}

			});

		}


	};

	pJS.fn.vendors.densityAutoParticles = function(){

		if(pJS.particles.number.density.enable){

			/* calc area */
			var area = pJS.canvas.el.width * pJS.canvas.el.height / 1000;
			if(pJS.tmp.retina){
				area = area/(pJS.canvas.pxratio*2);
			}

			/* calc number of particles based on density area */
			var nb_particles = area * pJS.particles.number.value / pJS.particles.number.density.value_area;

			/* add or remove X particles */
			var missing_particles = pJS.particles.array.length - nb_particles;
			if(missing_particles < 0) pJS.fn.modes.pushParticles(Math.abs(missing_particles));
			else pJS.fn.modes.removeParticles(missing_particles);

		}

	};


	pJS.fn.vendors.checkOverlap = function(p1, position){
		for(var i = 0; i < pJS.particles.array.length; i++){
			var p2 = pJS.particles.array[i];

			var dx = p1.x - p2.x,
				dy = p1.y - p2.y,
				dist = Math.sqrt(dx*dx + dy*dy);

			if(dist <= p1.radius + p2.radius){
				p1.x = position ? position.x : Math.random() * pJS.canvas.w;
				p1.y = position ? position.y : Math.random() * pJS.canvas.h;
				pJS.fn.vendors.checkOverlap(p1);
			}
		}
	};


	pJS.fn.vendors.createSvgImg = function(p){

		/* set color to svg element */
		var svgXml = pJS.tmp.source_svg,
			rgbHex = /#([0-9A-F]{3,6})/gi,
			coloredSvgXml = svgXml.replace(rgbHex, function (m, r, g, b) {
				if(p.color.rgb){
					var color_value = 'rgba('+p.color.rgb.r+','+p.color.rgb.g+','+p.color.rgb.b+','+p.opacity+')';
				}else{
					var color_value = 'hsla('+p.color.hsl.h+','+p.color.hsl.s+'%,'+p.color.hsl.l+'%,'+p.opacity+')';
				}
				return color_value;
			});

		/* prepare to create img with colored svg */
		var svg = new Blob([coloredSvgXml], {type: 'image/svg+xml;charset=utf-8'}),
			DOMURL = window.URL || window.webkitURL || window,
			url = DOMURL.createObjectURL(svg);

		/* create particle img obj */
		var img = new Image();
		img.addEventListener('load', function(){
			p.img.obj = img;
			p.img.loaded = true;
			DOMURL.revokeObjectURL(url);
			pJS.tmp.count_svg++;
		});
		img.src = url;

	};


	pJS.fn.vendors.destroypJS = function(){
		cancelAnimationFrame(pJS.fn.drawAnimFrame);
		canvas_el.remove();
		pJSDom = null;
	};


	pJS.fn.vendors.drawShape = function(c, startX, startY, sideLength, sideCountNumerator, sideCountDenominator){

		// By Programming Thomas - https://programmingthomas.wordpress.com/2013/04/03/n-sided-shapes/
		var sideCount = sideCountNumerator * sideCountDenominator;
		var decimalSides = sideCountNumerator / sideCountDenominator;
		var interiorAngleDegrees = (180 * (decimalSides - 2)) / decimalSides;
		var interiorAngle = Math.PI - Math.PI * interiorAngleDegrees / 180; // convert to radians
		c.save();
		c.beginPath();
		c.translate(startX, startY);
		c.moveTo(0,0);
		for (var i = 0; i < sideCount; i++) {
			c.lineTo(sideLength,0);
			c.translate(sideLength,0);
			c.rotate(interiorAngle);
		}
		//c.stroke();
		c.fill();
		c.restore();

	};

	pJS.fn.vendors.exportImg = function(){
		window.open(pJS.canvas.el.toDataURL('image/png'), '_blank');
	};


	pJS.fn.vendors.loadImg = function(type){

		pJS.tmp.img_error = undefined;

		if(pJS.particles.shape.image.src != ''){

			if(type == 'svg'){

				var xhr = new XMLHttpRequest();
				xhr.open('GET', pJS.particles.shape.image.src);
				xhr.onreadystatechange = function (data) {
					if(xhr.readyState == 4){
						if(xhr.status == 200){
							pJS.tmp.source_svg = data.currentTarget.response;
							pJS.fn.vendors.checkBeforeDraw();
						}else{
							console.log('Error pJS - Image not found');
							pJS.tmp.img_error = true;
						}
					}
				}
				xhr.send();

			}else{

				var img = new Image();
				img.addEventListener('load', function(){
					pJS.tmp.img_obj = img;
					pJS.fn.vendors.checkBeforeDraw();
				});
				img.src = pJS.particles.shape.image.src;

			}

		}else{
			console.log('Error pJS - No image.src');
			pJS.tmp.img_error = true;
		}

	};


	pJS.fn.vendors.draw = function(){

		if(pJS.particles.shape.type == 'image'){

			if(pJS.tmp.img_type == 'svg'){

				if(pJS.tmp.count_svg >= pJS.particles.number.value){
					pJS.fn.particlesDraw();
					if(!pJS.particles.move.enable) cancelRequestAnimFrame(pJS.fn.drawAnimFrame);
					else pJS.fn.drawAnimFrame = requestAnimFrame(pJS.fn.vendors.draw);
				}else{
					//console.log('still loading...');
					if(!pJS.tmp.img_error) pJS.fn.drawAnimFrame = requestAnimFrame(pJS.fn.vendors.draw);
				}

			}else{

				if(pJS.tmp.img_obj != undefined){
					pJS.fn.particlesDraw();
					if(!pJS.particles.move.enable) cancelRequestAnimFrame(pJS.fn.drawAnimFrame);
					else pJS.fn.drawAnimFrame = requestAnimFrame(pJS.fn.vendors.draw);
				}else{
					if(!pJS.tmp.img_error) pJS.fn.drawAnimFrame = requestAnimFrame(pJS.fn.vendors.draw);
				}

			}

		}else{
			pJS.fn.particlesDraw();
			if(!pJS.particles.move.enable) cancelRequestAnimFrame(pJS.fn.drawAnimFrame);
			else pJS.fn.drawAnimFrame = requestAnimFrame(pJS.fn.vendors.draw);
		}

	};


	pJS.fn.vendors.checkBeforeDraw = function(){

		// if shape is image
		if(pJS.particles.shape.type == 'image'){

			if(pJS.tmp.img_type == 'svg' && pJS.tmp.source_svg == undefined){
				pJS.tmp.checkAnimFrame = requestAnimFrame(check);
			}else{
				//console.log('images loaded! cancel check');
				cancelRequestAnimFrame(pJS.tmp.checkAnimFrame);
				if(!pJS.tmp.img_error){
					pJS.fn.vendors.init();
					pJS.fn.vendors.draw();
				}

			}

		}else{
			pJS.fn.vendors.init();
			pJS.fn.vendors.draw();
		}

	};


	pJS.fn.vendors.init = function(){

		/* init canvas + particles */
		pJS.fn.retinaInit();
		pJS.fn.canvasInit();
		pJS.fn.canvasSize();
		pJS.fn.canvasPaint();
		pJS.fn.particlesCreate();
		pJS.fn.vendors.densityAutoParticles();

		/* particles.line_linked - convert hex colors to rgb */
		pJS.particles.line_linked.color_rgb_line = hexToRgb(pJS.particles.line_linked.color);

	};


	pJS.fn.vendors.start = function(){

		if(isInArray('image', pJS.particles.shape.type)){
			pJS.tmp.img_type = pJS.particles.shape.image.src.substr(pJS.particles.shape.image.src.length - 3);
			pJS.fn.vendors.loadImg(pJS.tmp.img_type);
		}else{
			pJS.fn.vendors.checkBeforeDraw();
		}

	};




	/* ---------- pJS - start ------------ */


	pJS.fn.vendors.eventsListeners();

	pJS.fn.vendors.start();



};

/* ---------- global functions - vendors ------------ */

Object.deepExtend = function(destination, source) {
	for (var property in source) {
		if (source[property] && source[property].constructor &&
			source[property].constructor === Object) {
			destination[property] = destination[property] || {};
			arguments.callee(destination[property], source[property]);
		} else {
			destination[property] = source[property];
		}
	}
	return destination;
};

window.requestAnimFrame = (function(){
	return  window.requestAnimationFrame ||
		window.webkitRequestAnimationFrame ||
		window.mozRequestAnimationFrame    ||
		window.oRequestAnimationFrame      ||
		window.msRequestAnimationFrame     ||
		function(callback){
			window.setTimeout(callback, 1000 / 60);
		};
})();

window.cancelRequestAnimFrame = ( function() {
	return window.cancelAnimationFrame         ||
		window.webkitCancelRequestAnimationFrame ||
		window.mozCancelRequestAnimationFrame    ||
		window.oCancelRequestAnimationFrame      ||
		window.msCancelRequestAnimationFrame     ||
		clearTimeout
} )();

function hexToRgb(hex){
	// By Tim Down - http://stackoverflow.com/a/5624139/3493650
	// Expand shorthand form (e.g. "03F") to full form (e.g. "0033FF")
	var shorthandRegex = /^#?([a-f\d])([a-f\d])([a-f\d])$/i;
	hex = hex.replace(shorthandRegex, function(m, r, g, b) {
		return r + r + g + g + b + b;
	});
	var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
	return result ? {
		r: parseInt(result[1], 16),
		g: parseInt(result[2], 16),
		b: parseInt(result[3], 16)
	} : null;
};

function clamp(number, min, max) {
	return Math.min(Math.max(number, min), max);
};

function isInArray(value, array) {
	return array.indexOf(value) > -1;
}


/* ---------- particles.js functions - start ------------ */

window.pJSDom = [];

window.particlesJS = function(tag_id, params){

	//console.log(params);

	/* no string id? so it's object params, and set the id with default id */
	if(typeof(tag_id) != 'string'){
		params = tag_id;
		tag_id = 'particles-js';
	}

	/* no id? set the id to default id */
	if(!tag_id){
		tag_id = 'particles-js';
	}

	/* pJS elements */
	var pJS_tag = document.getElementById(tag_id),
		pJS_canvas_class = 'particles-js-canvas-el',
		exist_canvas = pJS_tag.getElementsByClassName(pJS_canvas_class);

	/* remove canvas if exists into the pJS target tag */
	if(exist_canvas.length){
		while(exist_canvas.length > 0){
			pJS_tag.removeChild(exist_canvas[0]);
		}
	}

	/* create canvas element */
	var canvas_el = document.createElement('canvas');
	canvas_el.className = pJS_canvas_class;

	/* set size canvas */
	canvas_el.style.width = "100%";
	canvas_el.style.height = "100%";

	/* append canvas */
	var canvas = document.getElementById(tag_id).appendChild(canvas_el);

	/* launch particle.js */
	if(canvas != null){
		pJSDom.push(new pJS(tag_id, params));
	}

};

window.particlesJS.load = function(tag_id, path_config_json, callback){

	/* load json config */
	var xhr = new XMLHttpRequest();
	xhr.open('GET', path_config_json);
	xhr.onreadystatechange = function (data) {
		if(xhr.readyState == 4){
			if(xhr.status == 200){
				var params = JSON.parse(data.currentTarget.response);
				window.particlesJS(tag_id, params);
				if(callback) callback();
			}else{
				console.log('Error pJS - XMLHttpRequest status: '+xhr.status);
				console.log('Error pJS - File config not found');
			}
		}
	};
	xhr.send();

};